In another post, we learned how to exploit all the ASMCA GUI features. asmca can be invoked with the -silent option and can effectively become a great command line interface.

You can create disk groups with the ASMCA configuration tool (ASMCA) or asmcmd command line interface as shown in this blog entry:
New ways to create disk groups in Oracle Database 11g Release 2

Another useful Oracle Database 11g Release 2 feature is the capability to add disk(s) to an existing disk group using asmca. In our example, we will add ORCL:DATA3 ASMLIB disk to the DATA diskgroup. Before we add the disk group, let’s look at the disks that make up the DATA disk group:

 
[oracle@jin1 ~]$ asmcmd lsdsk -G data
Path
ORCL:DATA1
ORCL:DATA2

Adding disks to an existing disk group:

Now, using ASM configuration assistant, let’s add a disk to the DATA disk group:

 
[oracle@jin1 ~]$ asmca -silent -adddisk -diskgroupname DATA -disk 'ORCL:DATA3'

Disks added successfully to diskgroup DATA

Let’s confirm that ORCL:DATA3 disk is added:

 
[oracle@jin1 ~]$ asmcmd lsdsk -G data
Path
ORCL:DATA1
ORCL:DATA2
ORCL:DATA3

Create ASM Volumes with asmca

You can leverage asmca to create volumes out of existing disk groups. Once you create volumes, you can use them to create ASM cluster file systesm. Let’s go through the process of creating a volume of the DATA disk group and creating an ASM cluster file system and mounting the file system for end users.

 
[oracle@jin1 tmp]$ ksh cr_asmca_volume.txt 

Volume vol_lob created successfully.

The contents of the file cr_asmca_volume.txt looks like this:

 
[oracle@jin1 tmp]$ cat cr_asmca_volume.txt 
asmca -silent \
      -createVolume \
      -volumeName vol_lob \
      -volumeDiskGroup LOBDATA \
      -volumeSizeGB 4 

Listing the /dev/asm directory, you can see that our volume that was create is vol_lob-484:

 
[oracle@jin1 tmp]$ ls -ltr /dev/asm
total 0
brwxrwx--- 1 root oinstall 252, 174081 Sep  9 00:45 vol_rpts-340
brwxrwx--- 1 root oinstall 252, 174082 Sep 11 06:58 vol_logfile-340
brwxrwx--- 1 root oinstall 252, 247809 Sep 12 13:29 vol_lob-484

Create ASM cluster file system (ACFS) with asmca

Using the vol_lob-484 volume, let’s create an ACFS file system:

 
[oracle@jin1 tmp]$ asmca -silent -createACFS -acfsVolumeDevice /dev/asm/vol_lob-484

ACFS creation on /dev/asm/vol_lob-484 completed successfully. 
The ACFS should be mounted for use.

For the final step, login as root and mount the ASM file system:

 
[root@jin1 acfsmounts]# pwd
/apps/oracle/acfsmounts
[root@jin1 acfsmounts]# mkdir lobdata
[root@jin1 acfsmounts]# mount -t acfs /dev/asm/vol_lob-484 /apps/oracle/acfsmounts/lobdata

Verify that the newly created file system is mounted:

 
[root@jin1 acfsmounts]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      122G   11G  106G   9% /
/dev/sda1              99M   12M   82M  13% /boot
tmpfs                 1.1G  154M  874M  15% /dev/shm
.host:/               163G  149G   15G  91% /mnt/hgfs
/dev/asm/vol_rpts-340
                      5.0G   49M  5.0G   1% /apps/oracle/acfsmounts/data_vol_rpts
/dev/asm/vol_logfile-340
                      3.0G  221M  2.8G   8% /apps/oracle/acfsmounts/data_vol_logfile
/dev/asm/vol_lob-484  4.0G   45M  4.0G   2% /apps/oracle/acfsmounts/lobdata

Posted by Charles Kim, Oracle ACE Director

Posted in ASM
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